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Response Caching with Cloud Object Store

rokharris

Hi,

I am looking for clarity on HTTP response caching for Hosted Feature Services.

With the Object Store, I see it can be configured via ArcGIS Datastore on its own VM/Instance or a Cloud Object Store.

For Response Caching of Hosted Feature layer queries, is this only available if it is configured via ArcGIS Datastore VM/Instance or is this functionality also available via Cloud Object Store (S3, or Azure Container)?

Also, does this only store a given query response and then deletes the response? I am wondering how this operation works.

Thanks,

rokharris

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Sarah_Hanson

Hi @rokharris - Thank you for your question!

Response caching is not limited to ArcGIS Enterprise deployments that are using the ArcGIS Data Store object store. That said, there was a defect recently logged specific to ArcGIS Enterprise 11.5 that prevents query response caching from working as expected when the object store is configured using Amazon S3 / Azure Blob Storage. Here is the defect information (along with a workaround noted): BUG-000177268 - Enabling response caching on a hosted feature layer fails with an error, "Object Store is disabled", when a cloud store is configured as the object store instead of the ArcGIS Datastore Object Store.

For more information on response caching, please refer to this ArcGIS Blog: Use response caching in ArcGIS Enterprise. If you have further questions or feedback, please don't hesitate to follow up. Thanks!

PatriceLabbé

Hi @Sarah_Hanson,

Can you help us on how to implement the workaround please?

Thank you very much!

Sarah_Hanson

Hi @PatriceLabbé - As the defect details note, the workaround involves updating the JSON for the registered data store from the REST Admin API to include the provider property (Amazon / Azure) twice— once at the root level, like is shown in the current REST API example for adding an object store, and then a second time (duplicated) within the info property. For example...

{
    "path": "/cloudStores/<value>",
    "type": "objectStore",
    "provider": "amazon",
    "info": {
        "provider": "amazon",
       "systemManaged":false,

Technical support will be the best resource to guide you through implementing the workaround.

PatriceLabbé

Hi @Sarah_Hanson,

Since we're upgrading from 11.3 (no object store) to 11.5 and still working on migrating our dev environment, we simply deleted all hosted scene layers / packages and then unregistered the object store first. Then we ran our Azure DevOps pipeline to register the object store with the workaround. Now caching works as expected.

Thanks!

Sarah_Hanson

I am glad you got it working @PatriceLabbé.

For others reading this: deleting layers and unregistering the object store is not a required step. Instead, you can update the existing data store item via the REST Admin API to insert the additional info parameter and then save the changes.

NicolasGIS

Hello @Sarah_Hanson,

Thanks for your reply.

As you seem to be aware about response caching, I was wondering if you have any reply to this question:

https://community.esri.com/t5/arcgis-enterprise-in-the-cloud-questions/response-caching-with-cloud-object-store/m-p/1634601#M903

Is CDN cache supported for non-hosted feature layers or in the pipeline ?

Thanks

Sarah_Hanson

Hi @NicolasGIS , response caching for feature layers that reference a registered data store (i.e. a non-hosted feature layer) is planned for a future release of ArcGIS Enterprise. It's something we are hoping to deliver later this year, although the timeline is subject to change. Thank you!

NicolasGIS

Good to know. Thanks for your reply. Much appreciated.

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